6428406 has 8 divisors (see below), whose sum is σ = 12856824. Its totient is φ = 2142800.

The previous prime is 6428399. The next prime is 6428407. The reversal of 6428406 is 6048246.

It is a sphenic number, since it is the product of 3 distinct primes.

6428406 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6428407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 535695 + ... + 535706.

It is an arithmetic number, because the mean of its divisors is an integer number (1607103).

Almost surely, 2^6428406 is an apocalyptic number.

6428406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6428406 is a wasteful number, since it uses less digits than its factorization.

6428406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071406.

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 6428406 is about 2535.4301410214. The cubic root of 6428406 is about 185.9378333116.

The spelling of 6428406 in words is "six million, four hundred twenty-eight thousand, four hundred six".